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Title: Holographic arrays for multi-path imaging artifact reduction

Abstract

A method and apparatus to remove human features utilizing at least one transmitter transmitting a signal between 200 MHz and 1 THz, the signal having at least one characteristic of elliptical polarization, and at least one receiver receiving the reflection of the signal from the transmitter. A plurality of such receivers and transmitters are arranged together in an array which is in turn mounted to a scanner, allowing the array to be passed adjacent to the surface of the item being imaged while the transmitter is transmitting electromagnetic radiation. The array is passed adjacent to the surface of the item, such as a human being, that is being imaged. The portions of the received signals wherein the polarity of the characteristic has been reversed and those portions of the received signal wherein the polarity of the characteristic has not been reversed are identified. An image of the item from those portions of the received signal wherein the polarity of the characteristic was reversed is then created.

Inventors:
 [1];  [1];  [2]
  1. Richland, WA
  2. Kennewick, WA
Issue Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
919878
Patent Number(s):
7295146
Application Number:
11/088,470
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01Q - ANTENNAS, i.e. RADIO AERIALS
G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

McMakin, Douglas L, Sheen, David M, and Hall, Thomas E. Holographic arrays for multi-path imaging artifact reduction. United States: N. p., 2007. Web.
McMakin, Douglas L, Sheen, David M, & Hall, Thomas E. Holographic arrays for multi-path imaging artifact reduction. United States.
McMakin, Douglas L, Sheen, David M, and Hall, Thomas E. Tue . "Holographic arrays for multi-path imaging artifact reduction". United States. https://www.osti.gov/servlets/purl/919878.
@article{osti_919878,
title = {Holographic arrays for multi-path imaging artifact reduction},
author = {McMakin, Douglas L and Sheen, David M and Hall, Thomas E},
abstractNote = {A method and apparatus to remove human features utilizing at least one transmitter transmitting a signal between 200 MHz and 1 THz, the signal having at least one characteristic of elliptical polarization, and at least one receiver receiving the reflection of the signal from the transmitter. A plurality of such receivers and transmitters are arranged together in an array which is in turn mounted to a scanner, allowing the array to be passed adjacent to the surface of the item being imaged while the transmitter is transmitting electromagnetic radiation. The array is passed adjacent to the surface of the item, such as a human being, that is being imaged. The portions of the received signals wherein the polarity of the characteristic has been reversed and those portions of the received signal wherein the polarity of the characteristic has not been reversed are identified. An image of the item from those portions of the received signal wherein the polarity of the characteristic was reversed is then created.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {11}
}

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Works referenced in this record:

Circularly polarized millimeter-wave imaging for personnel screening
conference, May 2005


Whole-body 35-GHz security scanner
conference, August 2004


Millimeter-wave imaging for concealed weapon detection
conference, July 2003


IR polarimetry and far-IR imaging
conference, October 2004

  • McMillan, Robert W.; Kirkland, James H.; Milton, Jr., Osborne J.
  • Optical Science and Technology, the SPIE 49th Annual Meeting, SPIE Proceedings
  • https://doi.org/10.1117/12.565671

Three-dimensional millimeter-wave imaging for concealed weapon detection
journal, January 2001